ἀναχώρησις
From LSJ
ἡ δὲ φύσις φεύγει τὸ ἄπειρον· τὸ μὲν γὰρ ἄπειρον ἀτελές, ἡ δὲ φύσις ἀεὶ ζητεῖ τέλος → nature, however, avoids what is infinite, because the infinite lacks completion and finality, whereas this is what Nature always seeks
English (LSJ)
εως, Ion. ιος, ἡ,
A retiring, retreat, Hdt.9.22, Th.1.12,al.; ἀ. ποιεῖσθαι, of a river, D.S.1.10; of waves, ἐπιδρομαὶ καὶ -σεις Arist. Mu.400a27; τοῦ ποταμοῦ PPetr.2p.45(iii B.C.). II place or means of retreat, Th.1.90, D.19.41. III return, Pl.Phlb.32b. IV absence, τὰ ὄντα ἐν -ήσει BGU447.6 (ii A.D.), cf. PTeb.353.6 (ii A.D.); retirement, μετὰ φίλων -ιν εὔσχολον Phld.Oec.p.64J.